ABSTRACT Tennis is a world class competitive sport played under the rules of the International Tennis Federation. Also, tennis is characterized by repetitive actions of different types of strokes in match. Te aim of this study was to determine if there are differences in the situational effi- ciency parameters between two groups of players (winners and losers) in the women’s main draw competition at Roland Garros 2022. Tis study included 125 main draw matches. Dif- ferences in performance were analysed across 7 situational efficiency variables: aces, double faults, 1st serve average speed, 2nd serve average speed, winners, unforced errors and forced errors. Te results showed significant differences between winners and losers group of play- ers with the following parameters on the winners’ side: winners (25.03/19.83; p < 0.0071) and unforced errors (22.80/29.06; p < 0.0071). Te results demonstrated that there were no significant differences in double faults, 1st serve average speed, 2nd serve average speed, forced errors and aces. In addition to all the above, it is notable that more successful ten- nis players, as well as having more winners, record less unforced errors. Te information obtained should be used by tennis coaches in planning trainings and preparing matches in order for their tennis players to achieve maximum results. Keywords: match analysis, match statistics, player efficiency Zlatan Bilić, Petar Barbaros, Stipe Čubrić Faculty of Kinesiology, University of Zagreb, 10000 Zagreb, Croatia Differences in the Situational Parameters of Tennis Matches Between Winners and Losers in The Women’s Main Draw Competition At Roland Garros 2022 INTRODUCTION Performance in tennis consists of several interrelated parameters that include technical, tactical, psychological, and functional abilities (Kovacs, 2007). In order to achieve successful performance in tennis, female tennis players must develop many interrelated tennis skills to reach high level of success in a tennis match. Success or failure of any type of stroke in tennis can be a matter of